The first thing to check is that the user has the latest version of MAE (Currently 2.0.2). If the problem persists, it is due to the fact that the user has more than 591 characters in the PATH environment variable. The workaround at this time is the following:
Step 1
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Start MAE up with the full path.
An example would be '/opt/apple/bin/mae'. This will allow MAE to startup without referring to the PATH environment variable.
Step 2
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Reduce the PATH to less than 591 characters.